Equilibrium may refer to:

• Sense of balance, which maintains physical balance in humans and animals

• Thermodynamic equilibrium, when internal processes of a system cause no overall change in temperature or pressure
• Dynamic equilibrium, when two reversible processes (in thermodynamics) occur at the same rate
• Chemical equilibrium, when a chemical reaction proceeds at the same rate as its reverse reaction, with no change in the amount of each compound
• Mechanical equilibrium, when the sum of the forces and moments on each particle of a system is zero
• Quasistatic equilibrium, when internal processes change gradually from one equilibrium state to the next

• Punctuated equilibrium, a part of evolutionary theory that states that speciation occurs relatively quickly with long periods of little change in between.

• Economic equilibrium, a balance of supply and demand
• Static equilibrium (economics), an intersection of supply and demand
• General equilibrium, a complex theory of microeconomics
• Patterson equilibrium, a theory of efficiency and system disruption

• Nash equilibrium an optimal collective strategy in a game involving two or more players

• Reflective equilibrium in ethics, a state of balance among a set of beliefs

• Equilibrium (2002 film), a science fiction film
• Equilibrium (band), a German viking metal band
• "Equilibrium (DS9 episode)", an episode of Star Trek: Deep Space Nine

Gleichgewicht | Equilibrio | Equilibro | שיווי משקל | Equilíbrio | Равновесие | Denge